PlantTFDB
Plant Transcription Factor Database
v4.0
Previous version: v1.0, v2.0, v3.0
Ricinus communis
bZIP Family
Species TF ID Description
28095.m000094bZIP family protein
28196.m000211bZIP family protein
28226.m000857bZIP family protein
28617.m000204bZIP family protein
28779.m000140bZIP family protein
28883.m000741bZIP family protein
28976.m000155bZIP family protein
29002.m000146bZIP family protein
29042.m000023bZIP family protein
29216.m000249bZIP family protein
29577.m000449bZIP family protein
29598.m000468bZIP family protein
29625.m000702bZIP family protein
29634.m002076bZIP family protein
29646.m001068bZIP family protein
29646.m001108bZIP family protein
29729.m002363bZIP family protein
29801.m003176bZIP family protein
29804.m001495bZIP family protein
29832.m000310bZIP family protein
29848.m004650bZIP family protein
29863.m001047bZIP family protein
29883.m001986bZIP family protein
29889.m003278bZIP family protein
29889.m003420bZIP family protein
29908.m005962bZIP family protein
29908.m005963bZIP family protein
29940.m000398bZIP family protein
29955.m001177bZIP family protein
30005.m001260bZIP family protein
30055.m001548bZIP family protein
30055.m001550bZIP family protein
30068.m002661bZIP family protein
30076.m004659bZIP family protein
30089.m001012bZIP family protein
30131.m007078bZIP family protein
30131.m007145bZIP family protein
30131.m007163bZIP family protein
30138.m003866bZIP family protein
30138.m003906bZIP family protein
30170.m013679bZIP family protein
30170.m013705bZIP family protein
30170.m013868bZIP family protein
30170.m014146bZIP family protein
30170.m014243bZIP family protein
30170.m014268bZIP family protein
30174.m008698bZIP family protein
30226.m002055bZIP family protein
36228.m000014bZIP family protein
55072.m000012bZIP family protein
bZIP Family Introduction

The bZIP domain consists of two structural features located on a contiguous alpha-helix: first, a basic region of ~ 16 amino acid residues containing a nuclear localization signal followed by an invariant N-x7-R/K motif that contacts the DNA; and, second, a heptad repeat of leucines or other bulky hydrophobic amino acids positioned exactly nine amino acids towards the C-terminus, creating an amphipathic helix. To bind DNA, two subunits adhere via interactions between the hydrophobic sides of their helices, which creates a superimposing coiled-coil structure. The ability to form homo- and heterodimers is influenced by the electrostatic attraction and repulsion of polar residues flanking the hydrophobic interaction surface of the helices.

Plant bZIP proteins preferentially bind to DNA sequences with an ACGT core. Binding specificity is regulated by flanking nucleotides. Plant bZIPs preferentially bind to the A-box (TACGTA), C-box (GACGTC) and G-box (CACGTG), but there are also examples of nonpalindromic binding sites.

Jakoby M, Weisshaar B, Droge-Laser W, Vicente-Carbajosa J, Tiedemann J, Kroj T, Parcy F
bZIP transcription factors in Arabidopsis.
Trends Plant Sci, 2002. 7(3): p. 106-11.
PMID: 11906833